Young K C, Main C, Gillespie F C, Stephen K W
J Oral Rehabil. 1978 Jul;5(3):207-13. doi: 10.1111/j.1365-2842.1978.tb01237.x.
Since the ability of u.v. setting pit and fissure sealants to set in depth is dependent on the penetration of the u.v. radiation, the absorption coefficients of Nuva-seal and Alphaseal were determined at 365 nm, the wavelength of radiation used to polymerise both materials. Nuva-seal and Alphaseal had absorption coefficients of 0.165 mm-1 and 6.25 mm-1, respectively. The u.v. fluorescent dye present in Alphaseal contributed 2.5 mm-1 to its absorption coefficient and the remaining absorption was due to the 5% w/w catalyst concentration present, since the basic resin had no significant absorption. Therefore Nuva-seal may set adequately to the depths required of fissure sealants, but Alphaseal may not, unless a very high intensity u.v. source is used. A reduction in the catalyst concentration and the removal of the u.v. fluorescent dye might improve the setting characteristics of Alphaseal.
由于紫外线固化窝沟封闭剂的深层固化能力取决于紫外线辐射的穿透深度，因此在365nm（用于聚合这两种材料的辐射波长）下测定了Nuva-seal和Alphaseal的吸收系数。Nuva-seal和Alphaseal的吸收系数分别为0.165mm-1和6.25mm-1。Alphaseal中存在的紫外线荧光染料对其吸收系数的贡献为2.5mm-1，其余吸收是由于存在5%w/w的催化剂浓度，因为基础树脂没有显著吸收。因此，Nuva-seal可能能够充分固化至窝沟封闭剂所需的深度，但Alphaseal可能无法做到，除非使用非常高强度的紫外线光源。降低催化剂浓度并去除紫外线荧光染料可能会改善Alphaseal的固化特性。
